What is fake antivirus? This is a type of virus/malwares which disguises itself to be an antivirus. It infects your computer when you accidentally click a link in a website which will download the malware into your computer and run automatically when your windows boot. It scan the infected computer and produces fake alert warnings. It convinces you that your computer is in danger and urge you to purchase a useless copy of the fake antivirus. These fake antiviruses must be removed immediately.